Tablet-forming machine.



B. W. SCOTT.

TABLET FOEMING MACHINE.

ABRLIGATION FILED H0115. 19o?.

Patented Oct. 20; 1908.

4 SHEETS-SHEET 1.

l WITNEssEs 7.

INVENTOR WW f "/4 B. W. SCOTT. TABLET- FOBMING MACHINE. APPLIOATIONFILED Nov. 15, 1907.

lmemed 001;. 20, 1908.A

4 SHEETS-SHEET z.V

"13. w. SCOTT.

TABLET POBMING MACHINE.

APPLICATION FILED NOV. 15, 1907.

901,937. Patented Oct. 20, 1908.

4 SHEETS-SHEET 3.

WITNESSES B. W. SCOTT.

TABLET FORMING MACHINE. 4 APPLIGLTION FILED Nov. 1 5, 1907.

Patented Oct. 20, 1908.

4 SHEETS-SHEET 4.

INVENTOR ab? f f l .45 p. the construction o a p uncli.

- To all whom it may concern: 'l

UNITED-sTATEs rArENT OFFICE.

vVBURToisI W. sooTT, oF DETROIT, MICHIGAN, AssIGNoR To ARTHUR ooL'ioNCOMPANY, oF

DETROIT, MICHIGAN,` A CORPORATION OF MICHIGAN.

No'. 901,937. l speeificationpf Application med November 15, 1907.serial No. 402,263.

Be it knownthat I, BURTON Soo'ri, a citizen of the United States,residing at Detroit, county of'IVayne, Stateof Michigan, have inventedcertain new and useful Improvements in Tablet-Forming' Machines, anddeclare the following to be a A full, clear, and exact description ofthe same,

such as will enable others skilled in the art to .f which it pertains tomake and use the fsa'me, reference being had to the accompanyjingdrawings, which form a part of this speciication. L v

My invention relates to-tablet forming machines, and has forits objectto provide .an improved machine' by which medicinal powder maybe pressedinto tabletsof a required form and size.

'chinev embodying myl invention. Fig. 2, is

In the accompanying drawings-: Figure l, is an eleva-tion of a tabletforming niaa plan view of the saine, the `Qpo'wder receptacle, .theupper compression roll, arbor and lattached cani being removed, and apart shown in section to show the actuating worm. Fig. 3, is aperspective view of the 'powder distributing frame.-4 Fig. 4, is a section taken in avertical plane through the axis of the upper partof themachine, at right anglesto the shaft E, some of the parts beingshown infull. Fig. 5, is a detail View of a portion of the'upper part of themachine, looking'fi'oin the right of Fig.

' are reti-acted.

2, the shield S lbeing removed. Figf, is a det-ail sectional view, someof the parts ybeing shown in full, and the section taken on the line,6-6, Fig.

2, the'point of view being from the left ofsaid line, as shown in Fig.2. Fig'. 7, is a-detail part sectional view,`illus -tra-ting the wayin'which the lower punches Fig3 8, isa detailsectional View of thedistributing frame on the line 8 8 Fig. 2, a portion of the rotary headfbeing indicated in dotted'lines. Figs..9 and 10'are detail pers ectiveviews illustrating Ais a standard upon which is a table B. C is abracket extending Ifrom the standard A, and Dis a standard extendingfrom the outer end of the bracket C.

- E is a shaft supported in bearings inthe ,standard-'1),'adaptedtobeeactuated by a TABILET-VFORMIG MACHINE .I

' having a w orml-F (Fig. 2) at its center.

. J is a standard rising from the center of the table B.

I is an annular cam.

-Ia is a sleeve extending upward concentric with-the cam I; said camrests upon the table B and the sleeve Ia upon the cam I, bothsurrounding the standard J.

H is a rotary head adapted to turn upon the/ sleeve Ia concentric withsaid cam and provided at its periphery with worm teeth h, with whichteeth the .worm F engages to `rotate the head H whenthe shaft E isrotated.

5, 5, is an annular surface upon an upper cylindrical portion of thehead H.

6a are cylindrical apertures formed in the surface 5 of the liead^Hadjacent to the pecent-ric with said head being formed.

'6 are dies secured in the apertures 6a. The apertures 61 are extendeddownward through the head H near its periphery and are fitted, so Aas toreciprocate, punches having small upper cylindrical portions )punches7rest upon the u-pper 'edge of the camll', and are actuated thereb as thehead H is rotated, carrying the punc es with it.

10- is a cam engaging over the disks 9 of the punches 7 to retractthesame where the cam 11 .slopes downward. The cam 10 is Iprovided, incase the punches 7 should stick and fail to drop by their own weight.

of the head H, and 3 are blocks or cross- `reciprocate verticallytherein.

riphe'ry thereof, a ring of said apertures con'- i which upperv portionsitinto the cylindricai apertures inv the dies 6, their upper ends Y.forming bottoms .of the liollows or matrices `headsfittinginto theslots. 2,' and adapted to ipulley G or G1, ora hand wheel W, vand intothe extended portion of-these apertures V surface, by screw 13, thedowerends o the 2 are radial slots formed inthe upper part drical, andadapted to fit into. the apertures of the dies 6. The slots 2 do notextend quite down :to the surface 5 of the head H, but leave a smoothcylindrical portion 5a.

-14 is an arbor secured at one end to `the upper end of the standard Jand at the other end to the upper end of the standard D.-

16 is a cam upon the arbor 14, adapted tol contact the upper ends of thedies, and forcev said dies downward.

I cross-head 12*L below the table B, and ex-A 15 is a wheel pivoted uponthe arbor 14 in position to contact the upper endsl of the punches 4 asthey pass under said wheel, and force said punches downwardtotheirvlowest position, as indicated in Fig. 4.

12a is a cross-head adapted to reciprocate vertically in ways on thestandard D.

12 is 'a wheel pivoted in bearings onthe tending upward through a slotin the same, the wheel 12 being located directly below the wheel 15, andadapted to contact the lower ends of the punches 7. The cam 11 is brokenaway to make room for the upperY portion of the wheel 12, which forms acon-l tinuation of said cam.

17 is a powder distributing frame adapted to be fitted to the surface 5of the head H. The distributing frame 17 is divided into two concentricchambers having the form of arcs of circles: The outer chamber isindicated by the reference letter 18, and the inner chamber by thereference letter 19. The inner Wall of the distributing frame 17 liesagainst the cylindrical surface 5"l of the head H, and is heldstationary by a part or shield S secured to the table B. The chamber orcompartment 18 has a wall 18h at one end, and a wall 18f at the otherend, and is divided into sub-chambers or compartments 18, 18h, by a wall18C. The inner chamber or compartment 19 is provided with walls 19a,19h, 19e, 19d, and 19e, which divide it into various sub-compartments,as shown in the drawing, the walls 19, and 19e, constituting the endwalls.

18d is an aperture extending through the dividing wall between thechambers 18 and 19, so as to connect the subchamber 18a with the portionof the chamber 19 between the walls 19a and 19", and 18e is a similarpassage connecting the sub-compartments 18n with the compartment betweenthe walls 19b and 19.

18gis a passage connecting the sub-coinpartment 18b with thecompartment19, between the division .walls 19d and 19. The

aperture.

passage 18g lis located adjacent to the end wall 18f.Av

2O is a lreceptacle vided with a discharge pipe '21. The receptacle 2Ois supported by an arm 22 (Fig. 4), which i's pivoted upon the. rod 23,`rising from lthe standard J concentric therewith. The receptacle 20 maybe moved to ldeliver the powder to any part of the outer chamber 18 ofthe powder distributing frame 17, by turning said receptacle about therod V23. As a rule the powder is delivered toward the left-hand end ofthe compartment 18, as the frame is shown in Fig. 3. y

The walls 19a and 18h do not extend' radially to the head H, or itssurface 5, but form together a V-shaped guide, which will tend to pileany powder that may be carried against said guide in a heapv atthejunction of said walls. The other divlding for the powder, pro- Walls donot extend radially to the surface 5, but act in conjunction with thewall between the chambers 18 and 19 to lform guides which tend togather' any powder slantingly inward over andin contact with the surface5 to a point beyond the series of apertures in the dies 6, but leavingsome space between its inner end and the cylindrical surface 5a.

19f is an aperture formed throughv the partition or .wall 19e at thelower edge, and at the inner end of said partition.y

24 is a screw plug passing through an aperture in the table B, its upperend forming a portion of the cam surface of the annular cam 11. Thescrew plug 24 may be removed and any of the punches 7 may be droppedthrough the aperture thus left, thus removing them from the machine, andthey may be replaced by passing them through said In formmg punches, itisnecessary to carefully shape and harden that portion which does thecompressing,'and it is desirable to have a heavy and strong body to saiddies, so that they may be acted upon forcibly by the cams andpresservwheels without excessive wear or danger of breakage. This hasmade such punches very expensive to make. To avoid this, I form'the bodyof untempered steel, and at the upper end form a T-shaped aperture 7b(Fig. 9). I then form afsmall cylindrical end piece 8a having a head 8b(Fig. 10) and harden this small end piece to the required temper. theninserted inthe larger main body of the punch, as indicated in Fig. 9.

This is t head H, and as said, headis rotated is 4car-y rPhe operationofvthe 'above described de vice is vas followsi-The powder is placed inthe receptacle 20, flows downward throiigh the delivery spout 21, andstands in a heap in the distributing frame 17 in the compartvinentl'thereof, at the left Ahand end, as

shown in. Fig. 3, so that the-powder passesthrough the passage o raperture 18d between the partitions or d ivision'walls 19',l and 193.The powder rests upon the surface 5 ofthe passage oraperture 18g, whereit will be carrled along by the partition19e and allowed to pass throughthe passage or aperture 19f, and will then be carried'around by thesurface 5 inside of the gathering linger 26 of the delivery trough 25,and will be again gathered up by the partitions 19 Iand 18h.

The apertures in the dies 6 pass continually'under the gathering frame17 just in side of the wall between the compartments 18 and 19. When oneof said apertures passes under the partition or wall 19a, the punch 7having its upper part 8 extending 18e. Should the powder overfiow thepartiV and if it overflows this partitioi'n.

into said aperture, .is at its lowest position,-

and the powder retained by the walls or partition 19, 18h will fall intoand fillsaid opening. This powder will generally be loose, and theamount thatfalls into the opening will be somewhat variable on thisaccount; for this reason I so forinthe cam 1l as to slightly raise thedie 7 after it has passed the partit-ion 19a, so as to compact theprin-'der together within the opening in the dies (i. If this opening isnot entirely lilled,.

an additional quantity 'of powder willbe swept into it` by the partitionV19", and if then not entirely filled vby the partition 19, etc.

, The punches 4 are raised abovethe gathering frame 17 by the cam I,acting upon the lower ends of the rods 3a. `When such dies have passedthe gathering frame, they are forced downward again by the cam' 16,striking against their upper parts (Fig. 1), their cylindrical lowerends being forced into the aperture in a corresponding die 6 to` pressthe powder therein together, in conjunction with the corresponding lowerpunch 7 and its cylindrical extension 8. The iinal pressure to compactthe powder firmly into a;-

under the wheel'l. After having passed tablet is given when a punch 7passes overv ythe wheel 12, and a corresponding punch 4 the wheels 15and 12, thepunches 4 are again I raised by the cam I, and -the punches 7are raised by t-he cam 11, to force the tablet out of the aperture inthe die 6, asfindicated inV Fg. 6. The continued motion of the head Hcauses the finger 26.to sweep the tablet in'v vthe delivery trough 25,from which 'it is delivered to a basket, or convenient receptacle,.- Theproper degree of compression for the tablet is secured by regulating thevheight of the cross head 12a by means of the handwheel -12b, andcoacting parts. ItV` willbe seen. that the above construction issecured,

1and theipartsare strong,'easily removed and adjusted, and that acomplete 'filling ofthe Aso that each tablet shall contain its properquantity of medicinal material. p passing over the top of' a partition19- or 19? is loosened. so that -it will fall readily and erenly intothe-matrices of th'edies; v

so "f apertures of the dies is secured in everyy case, i

The powder The construction employing the blocks' in theslots2, withthedownwardly extending rods 3, enables small dies 4 to be used,.

which are comparatively cheap to'make f What I'claim is 1. In a'inachineofthe kinddescribed, the I combination of a. head, a die thereon pro`vided with' an aperture, a punchv locatedl above said head and adaptedtoengage in the aperture of said die, av party connected with ysaidpunch extending through. said head-and ada tedto reciprocate therein,and a cam located) to co-act with said part to actuatejsaid adaptedftobe removed from engagement with said head.

below 'said head `and adapted 10o punch, said pant and connected punchbeing f a. in d machine of the kind described, the

combination 4ofpaA head, a die thereonpro-` vided'with an aperture,afslot insaid head, a block fitting into'said slot, a punch secured tosaid block above said die andA adapted to engagekin the aperturethereof, a part eX- *i tending from said block through said head,

anda cam located lbelow said head vand adapted to coactwith said blockand punch Y tovactuatethe same. .i

3. In a. machine of the kind described, the combination of a rotaryhead, *a seriesof dies provided with apertures arranged ma circle onsaid head concentrictherewith, a

portion of lsaid head of less diameter than' 4 the series of diestandextending 'above said* dies, said cylindrical portion'being provldedwith slots extending radially inward the periphery thereof, blocksfitting 'in' sald i slots and carrying' punches located above A saiddies, and means for. actuating said 1'25 4. In d maden@ ofthe-kinddescribed, the f blocks.

combinationof a rotary-head, a series of dies provided with aperturesarranged inA a clrcle on said head concentric therewith, a portion ofsaid head of less diameter than' the series of dies and \extending abovesaid dies, said portion being provided with slots extending radiallyinward from the periphery thereof, blocks fitting in said slots andcarrying punches located above said dies, a part extending from eachv ofsaid blocks through said head, and' a cam located below said head andadapted to coact with said part .to actuate said punches'.

5." In a machine of the kind described,the combinationl of-a rotaryhead, a circular series of dies thereon having their upper surfaceslevel with a plane surface on said head, means for supplying powder tosaid dies, compressing it into tablets and lifting the tablets from saiddies, a delivery trough, a finger .extending `over said surface andadapted to guide the tablets into said trough,

' means for displacing` the surplus powder to a part of said surfaceinside of said. finger, and means for again displacing said powder tocause it to fall into said dies.

6. In a machine of the kind described, the combination of a rotary head,a circular series of dies thereon, a distributing frame.l divided intoa' plurality of compartments in the direction of motion of said head bywalls intermediate the ends of said frame of .a helght that shall permitany powder that shall accumulate a ainst it to pass over said' wall,said wall having its lower edge against the surface of' said head, and asecond wall adapted to gather together the powder that may pass oversaid `first mentioned wall, the parts being so arranged as to carry saiddies under said frame to receive the powder therefrom, and means forsupplying powder to sald frame upon the surface of said head,

v for the purpose described. 40v

7. In a machine ofthe lkind described, a dlstrlbuting frame 17, havingouter and innercompartments 18 and .19, a 'passage between saidcompartments,"'and means for supplyinglpowder to the outer compartmentso that it shall pass through said. passage to the inner compartment,and dies adapted to pass under said frame to receive the powder whichhas passed through said passage with their matrices. y 8.- In a machineof the kind described, a

distributing frame 1,7, having outer and A,inner compartments 18 and 19,a assage between said compartments, means or sup` plying powder to theouter compartment so Y that' it shall pass through said assage to theyinner compartment, .and a wa 191 in said' inner compartment furtheralong in the direction of motion of said head than said I passage.

9. -In a machine of the kind described, a distributing frame 17, havingouter# and inner compartments 18 and 19, a passage between saidcompartments, means for supplying powder to the outer compartment so'thatl it shall pass through said passage to the inner compartment, and awall 19b in said inner compartment further along in the direction ofmotion of said head than said passage, a partition in the compartment18, a second wall in the compartment 19, a lsecond passage fromthecompartment 18 adjacent and ahead of said partition with.

reference to the vmotion of the head, said passage leading to thecompartment 19 between said walls.

10. In a machine of the kind described, a rotary head having dies in asurface thereof, a distributing frame 17 resting on saidsurface andhaving outer and inner compartments having end walls, a wall dividingsaid inner compartments into two sub compartments, a partition dividingsaid outer compartment into two sub-compartments, a pasering finger 26terminating further from the center of said head than the vspacingin theend wall of theframe 17.

11. The combination of a rotary head having a die therein, adistributing frame having a` cross wall adapted to permit powder to passover it, and means for feeding powder l to the surface vof said head inadvance of sa-id wall, saidi die beingA adapted to pass under said frameto receive powder into its matrix, for the purpose described.

' In testimony whereof, I sign this lspecification in the presence oftwo witnesses.

' BURTON W. SCOTT.

Witnesses:

. ALEGIA TowNsEND, ELLIo'rr J .l S'roDDAnn.

